{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T18:38:33.463Z","years_from_j2000":26.673,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"ngc-1377","name":"NGC 1377","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":13.49,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":77296981.54330698,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":54.16283333333334,"dec_deg":-20.90225,"epoch_ra_deg":54.461142,"epoch_dec_deg":-20.813175,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Eridanus","discovered":"1799","featured":false,"url":"https://spacecatalog.org/object/ngc-1377","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.49,"h_mag":9.95,"j_mag":10.62,"k_mag":9.72,"redshift":0.005921,"hubble_type":"S0","wikidata_id":"Q1043082","redshift_cmb":0.005510541403370706,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14378079.37126755,14378079.37126755]},"major_axis_arcmin":2.07,"minor_axis_arcmin":0.95,"wikipedia_article":"NGC 1377","position_angle_deg":92,"surface_brightness":23.77,"radial_velocity_km_s":1770},"designations":[{"catalog":"2MASX","designation":"2MASX J03363907-2054081"},{"catalog":"ESO","designation":"ESO 548-051"},{"catalog":"ESO","designation":"ESO 548-51"},{"catalog":"ESO-LV","designation":"ESO-LV 548-0510"},{"catalog":"IRAS","designation":"IRAS 03344-2103"},{"catalog":"IRAS","designation":"IRAS F03344-2103"},{"catalog":"LEDA","designation":"LEDA 13324"},{"catalog":"MCG","designation":"MCG -04-09-033"},{"catalog":"NGC","designation":"NGC 1377"},{"catalog":"PGC","designation":"PGC 13324"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}